A method by which rhodoxanthin can be synthesized from 3-ethylenedioxy-.beta.-ionone as well as new and novel intermediates produced in the synthesis. Rhodoxanthin is a well-known coloring agent for foodstuffs, including beverages, pharmaceutical and cosmetic preparations.
一种从3-
乙烯二氧基-β-离子酮合成红黄素的方法,以及在合成过程中产生的新颖中间体。红黄素是食品、饮料、药品和化妆品制剂中广为人知的
着色剂。